Sean:
Since I was called out by name, I'll try to explain my reasoning.
First of all, I probably underrated Deal in The Confidential Guide. I just happen to have gone back over the book this weekend, cataloguing the ratings and adding ratings for the 250+ courses I've seen since the book was written [just in case I ever want to do anything with them], and I realized that Deal fit much more easily with the other courses rated 7 than 6. In fact, generally, I found that I tended to underrate the UK courses I saw back in 1982 compared to the rest of the world. I must be turning soft in my old age.
Still, a 7 on the Doak scale is not a slam dunk Top 100 in the World course ... I've got about 80 courses at 8 or higher, and about another 100 courses at 7. So, why don't I rate Deal an 8?
1. It's been years and years since I've been there, but I have played the course, twice.
2. It's partly the neighbors -- I clearly prefer Sandwich and Rye, and I didn't give Sandwich a 9 when I wrote the book, though I believe I did in the first edition.
3. The sea wall really detracts from the aesthetics.
4. Perhaps partly because of #1, where I feel the course falls short is in the number of really exciting, memorable holes. Machrihanish may not be nearly as consistent, but there are a bunch of holes on the front nine that I'm just itching to play again. How many would you credit for Deal? I've only got a couple.
In spite of the above, Deal is an excellent course, and it does have an excellent set of greens as you say. And, honestly, I might've felt differently about it if other friends [this means you, naffer!] hadn't made me defend my reasoning already. Once one starts making a list of reasons to keep a course off the top 100 list, it's in trouble, because most courses have "flaws", but it's really not about that at all. Sadly, Deal just doesn't have enough reasons to put it on my list, as 100 other courses do.
P.S. to Brian Sheehy: I'm not afraid to say that it's possible I've overlooked some of the merits of Deal, or any other course for that matter. But I've only played Sandwich twice and Rye twice, too. And that seems like a pretty high standard for list-making; really, how many hundreds of courses have YOU played more than twice? And, as Peter Pallotta posted on another thread a few days ago, for how many of them did you really change your mind after the first couple of plays?